Primer for gasoline engines



E. D. BARRETT. PRIMER FOR GASOLINE ENGINES. APPLICATION FILED FEB. 10, 1920.

Patented Mar. 218, 1922.

Md ATTORNEY- ERNEST D. BARRETT, OF NEW YORK, N. Y;

PRIMER FOR GASOLINE ENGINES.

ar en.

Specification of Letters Patent. Patented Mar. 28, 1922.

Application filed February 10, 1920. Serial No. 357,506.

To aZZ whom it may concern.

Be it known that I, ERNEST D. BARRETT, a. citizen of the United States, residing in New York, county and State of New York, have invented new-and useful Improvements in Primers for Gasoline Engines, of which the following is a specification.

This invention relates to priming devices for automobile engines and has for its principal objects the provision of a simple, cheap, yet effective mechanism which is certain in operation, easily applied by the purchaser without necessitating radical construction changes in the automobile and which withal is relatively small and unobtrusive.

In many of the primers heretofore devised the operation of the same has been dependent upon a gravity feed ofthe fluid fuel to the primer intake. Such primer is not only especially unreliable in hilly regions but slight injuries in the auxiliary gasoline feed pipe which leads'to the primerwill' often se riously interfere with or entirely prevent the operation of the primer;

My investigations have resulted in the production of a positively fed primer possessing all of the aforesaid desirable features while free from the said objections.

The invention is fully set forth in the following detailed description and drawings forminga part thereof, in which Figure 1 is a longitudinal elevation of my improved primer in position on an automobile engine;

Fig. 2 is a vertical section of the auxiliary cylinder and piston which serve to feed the motive fuel to the spray nozzles in the manifold;

Fig. 3 is a similar fragmentary section of the cylinder and piston showing the piston at the other end of its stroke;

Fig. 4 is a vertical section along the line 4-4 of Fig. 1; and I Fig. 5 is a longitudinal vertical section of the spray-nozzle which delivers motive fluid directly to the manifold adjacent the intake-valves of the engine cylinders.

Referring to the drawings and my preferred type of'construction as shown therein, the reference numeral 1 designates a pump cylinder, having intake 2 and outlet 3, in which a hollow cylinder 4 open at its upper end, loosely mounted on' a rod 5, is adapted to reciprocate. A screw-cap 6 tightly threaded on the upper end of the said rod 5 serves to lock the same when the primer is not in use and'to hold the bevelled face 7 of an adjustable thimble 8 which is threaded on the lower end of said rod, against the oblique annular valve-seat 9 on the head 10 of the cylinder 4.

An aperture 11- of substantially greater crosssectional area than the lower end 5 of said rod serves to admit the passage of gasoline from the upper to the lower side of the head 10 when the thimble 8 is carried by the upward stroke of the rod 5 into an elevated position with respect to the valveseat 9 as shown in Fig. 3. A pin 12 which, carried by the lower end of rod 5', is adapted to engage the head 10 upon the upward stroke of the rod 5 and effect the upward movement of the latter, thereby opening the needle-valve formed by theconical tip 13 of said rod and the cooperatingseat 14L surrounding the aperture in the lower head 15 of the pump cylinder 1.

Said cylinder 4 whichismounted at a convenient angle for the driver to reciprocate the same when seated in the automobile, is positioned adjacent the gas-line 16 which feeds the gas to the carbureter to which it is connected by the primer-intake pipe 17 by means of a three-way plug 18. The lower or outlet end of the cylinder is connected by the primer-outlet pipe 19 which is provided with spray nozzles 20 atthe terminals of each of its branches which are adapted to project through the manifold 21, and into the inlet ports 22 of casing 22- surrounding the intake-valves of the engine cylinders. Obviously, two nozzles may be used to feed the separate intake-valves of two adjacent cylinders or again the number of branches of the pipe 19 may be multiplied to any desired number to correspond to one nozzle for each cylinder.

The said nozzles 20 are provided with enlarged chambers 23 containing grooved whorl elements 24 which tend to atomize the stream of gasoline entering the said chambers, so that the effectiveness of the stream of gasoline issuing through the duct 25 is substantially increased. The configuration of'the end faces 2% of the whorling elements is such as to space such element from the end of chambers 23 containing same and prevent the closing of the duct 25 and consequently shutting-off the fiow of gasoline vapor or particles therethrough.

The operation of the primer, as is evident from the foregoing description thereof, is as follows:

he spark lever having been suitably adjusted in the customary manner and to i nite the gasoline entering the cylinders of der 4.- via pipe 19 and nozzles 20 into the ports 22 with the result that a limited. quantity of a fine spray of rich gas is introduced through the intake-valves of the engine cylinders during the starting operation. ()nce the engine starts, the pumping or by-passing of charges of rich gas to the engine around the ca-rbureter is no longer necessary and accordingly a rod 5 is securely locked in the position shown in Fig. 1 by merely screwing the cap 6 on the upper end of cylinder 4.

The space below the head 15 is preferably of suflicient capacity so as to introduce an excessive charge of gasoline into the engine cylinders when the piston-rod 5 is reciprocated a few times.

.- The branches 19 are swa 'ed into a asket is ca 1 22" which is interposed between the casing 22 and the manifold 21, the same being of lead or soft metal capable of resisting heat at that point. By this means a tight joint which is unaffected by the vibrations of the engine is produced and in practicethe same is found to be highly effective for long periods, without any leakage occurring around the branches 19 where the same contact with the said gasket. A convenient way to accomplish the foregoing is to mold the gasket around the branches 19 while the same are lying in the mold into which said metal is poured to form said gaskets 22".

Y Various modifications from the preferred construction herein described may be made without departing from the spirit of the invention as covered by the appended claims.

, Having thus described my invention, what I claim and desire to secure by U. S. Letters Patent, is:

'1. In a primer for gas engines, the combination comprising a carburetor, a. gasoline feed pipe in communication therewith, an engine manifold also incommunication with said carbureter, a conduit in communication with said. feed-pipe, pumpin means having an inlet and a valve-controlled outlet for fluid connected to said latter means and to the manifold of said engine andmeans including a gasket of relatively soft material interposed between said manifold and the casing of said engine and intimately and completely embracing a portion of the means connecting said pump and said manifold.

2. In a primer for gas engines, the combination comprising a pump cylinder, means for supplying motive fluid directly thereto, an appertured reciprocating plunger element in said cylinder, a, piston rod slidably se cured tosaid plunger, valve-seats carried by said plunger element and said cylinder respectively and cooperating with and adapted to be controlled by said plunger element, a conduit connected to the outlet of the pump cylinder provided with terminal spraying means and adz pted to project into the manifold of an automobile engine and extend into proximity to the ports of an engine casing connected to such manifold.

' 3. In a primer for gasengines, the combination comprising a pump cylinder, a piston adapted to reciprocate therein, a piston rod movably secured to said piston, a removable cap secured to one end of said piston rod and means for temporarily connecting said cap to one end of said cylinder whereby said piston rod may be locked in a predeter mined position. Y

' e. The combination with an engine manifold and acarbureter, of a conduit adapted to supply motive fluid to said carbureter, and to said manifold independently ofsaidcarbureter, pumping means, having an inlet and a-valve-controlled outlet, directly connected to said conduit, connecting means for conducting fluid from said pumping means to said manifold, and a gasket of soft material. intimately and completely embracing a portion of said connecting means and interposed between said manifold and its support.

5. Thecombinationwith an engine manifold and a carbureter, of a conduit adapted to supply motive fluid to said carburetor and to said manifold independently of said carbureter, pumping means, having an inletand a valve-controlled outlet, directly connected to said conduit, con necting means for conducting fluid from said pumping means to said manifold, and a packing gasket intimately and completely embracing a portion of said connecting means and interposed between said manifold and its support.

6. The combination comprising an engine manifold, a supporting casing secured thereto, conduit for supplying motive fluid, pumping means including a cylinder, a hollow reciprocating piston therein, a piston rod slidably secured to said piston, valve seats respectively carried by said piston and said cylinder and adapted to be controlled by said piston rod, a conduit connecting said pumping means to said supporting casing, a gasket interposed between said 130 manifold and said casing and completely surrounding and having gas-tight connection with said connecting conduit adjacent one end thereof, and a. spray nozzle secured to the end of said connecting conduit and adapted to project into said supporting casing, said spray-nozzle including an externally grooved cylindrical rotor element adapted to interrupt the flow of a continuous body of liquid motive fluid through said spray nozzle.

7. A primer for explosive engines comprising aconduit for supplying motive fuel, pumping means having an inlet and a valvecontrolled outlet in communication with said conduit, said pumping means including a cylinder, a hollow piston member therein a piston rod slidably connected therewith, a thimble threaded on said rod for adjusting the movement of said piston on said rod, cooperating Valve-faces on said thimble and said piston member surrounding an aperture extending through said piston member, a needle valve controlled by the movement of said piston rod for limiting the flow of motive fluid through the outlet of said pumping means, and means carried by said piston rod for locking the latter and thereby sealing said needle valve against communication therethrough.

Signed at New York, county and State of New York this 7th day of February, 1920.

ERNEST D. BARRETT. 

